The process by which organisms remove metabolic waste from their bodies is known as excretion. This process is crucial for maintaining homeostasis and involves the elimination of harmful byproducts produced from metabolic activities, such as nitrogenous wastes from protein metabolism. Different organisms utilize various mechanisms for excretion, including urine production in mammals or excreting waste through specialized structures in lower organisms. Efficient waste removal is vital for the overall health and functioning of living organisms.